生成验证码并验证用户身份的程序-yiteyi-C++库

A. 验证码（区分计算机和人类的完全自动化公共图灵测试）是一种确定用户是否为人类的测试。因此，任务是每次生成唯一的验证码，并通过要求用户输入自动生成的同一验证码并用生成的验证码检查用户输入来判断用户是否为人类。例如：

null

CAPTCHA: x9Pm72seInput: x9Pm62esOutput: CAPTCHA Not MatchedCAPTCHA: cF3yl9T4Input: cF3yl9T4Output: CAPTCHA Matched

推荐：请尝试你的方法 {IDE} 首先，在进入解决方案之前。

生成CAPTCHA的字符集存储在字符数组chrs[]中，该数组包含（a-z，a-z，0-9），因此chrs[]的大小为62。为了每次生成唯一的验证码，使用rand（）函数（rand（）%62）生成一个随机数，该函数生成一个介于0到61之间的随机数，生成的随机数作为字符数组chrs[]的索引，从而生成一个新的验证码[]字符，该循环运行n次（验证码长度）以生成给定长度的验证码。

CPP

                         // C++ program to automatically generate CAPTCHA and                       
                         // verify user                       
                         #include<bits/stdc++.h>                       
                         using                                     namespace                                     std;                       
           
                         // Returns true if given two strings are same                       
                         bool                                     checkCaptcha(string &captcha, string &user_captcha)                       
                         {                       
                                                 return                                     captcha.compare(user_captcha) == 0;                       
                         }                       
           
                         // Generates a CAPTCHA of given length                       
                         string generateCaptcha(                                     int                                     n)                       
                         {                       
                                                 time_t                                     t;                       
                                                 srand                                     ((unsigned)                                     time                                     (&t));                       
           
                                                 // Characters to be included                       
                                                 char                                     *chrs =                                     "abcdefghijklmnopqrstuvwxyzABCDEFGHI"                       
                                                 "JKLMNOPQRSTUVWXYZ0123456789"                                     ;                       
           
                                                 // Generate n characters from above set and                       
                                                 // add these characters to captcha.                       
                                                 string captcha =                                     ""                                     ;                       
                                                 while                                     (n--)                       
                                                 captcha.push_back(chrs[                                     rand                                     ()%62]);                       
           
                                                 return                                     captcha;                       
                         }                       
           
                         // Driver code                       
                         int                                     main()                       
                         {                       
                                                 // Generate a random CAPTCHA                       
                                                 string captcha = generateCaptcha(9);                       
                                                 cout << captcha;                       
           
                                                 // Ask user to enter a CAPTCHA                       
                                                 string usr_captcha;                       
                                                 cout <<                                     "Enter above CAPTCHA: "                                     ;                       
                                                 cin >> usr_captcha;                       
           
                                                 // Notify user about matching status                       
                                                 if                                     (checkCaptcha(captcha, usr_captcha))                       
                                                 printf                                     (                                     "CAPTCHA Matched"                                     );                       
                                                 else                       
                                                 printf                                     (                                     "CAPTCHA Not Matched"                                     );                       
           
                                                 return                                     0;                       
                         }                       

Python3

                         # Python program to automatically generate CAPTCHA and                       
                         # verify user                       
                         import                                     random                       
           
                         # Returns true if given two strings are same                       
                         def                                     checkCaptcha(captcha, user_captcha):                       
                                                 if                                     captcha                                     =                                     =                                     user_captcha:                       
                                                 return                                     True                       
                                                 return                                     False                       
           
                         # Generates a CAPTCHA of given length                       
                         def                                     generateCaptcha(n):                       
                                   
                                                 # Characters to be included                       
                                                 chrs                                     =                                     "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"                       
                                   
                                                 # Generate n characters from above set and                       
                                                 # add these characters to captcha.                       
                                                 captcha                                     =                                     ""                       
                                                 while                                     (n):                       
                                                 captcha                                     +                                     =                                     chrs[random.randint(                                     1                                     ,                                     1000                                     )                                     %                                     62                                     ]                       
                                                 n                                     -                                     =                                     1                       
                                                 return                                     captcha                       
           
                         # Driver code                       
           
                         # Generate a random CAPTCHA                       
                         captcha                                     =                                     generateCaptcha(                                     9                                     )                       
                         print                                     (captcha)                       
           
                         # Ask user to enter a CAPTCHA                       
                         print                                     (                                     "Enter above CAPTCHA:"                                     )                       
                         usr_captcha                                     =                                     input                                     ()                       
           
                         # Notify user about matching status                       
                         if                                     (checkCaptcha(captcha, usr_captcha)):                       
                                                 print                                     (                                     "CAPTCHA Matched"                                     )                       
                         else                                     :                       
                                                 print                                     (                                     "CAPTCHA Not Matched"                                     )                       
           
                         # This code is contributed by shubhamsingh10                       

输出：

CAPTCHA: cF3yl9T4Enter CAPTCHA: cF3yl9T4CAPTCHA Matched

本文由 希曼苏·古普塔（巴格里） .如果你喜欢GeekSforgek，并想贡献自己的力量，你也可以使用贡献极客。组织或者把你的文章寄到contribute@geeksforgeeks.org.看到你的文章出现在Geeksforgeks主页上，并帮助其他极客。如果您发现任何不正确的地方，或者您想分享有关上述主题的更多信息，请写下评论。

文章版权归作者所有，未经允许请勿转载。

THE END

技术文章